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Four thousand active nuclei of a radioac...

Four thousand active nuclei of a radioactive material are present at `t=`0. After 60 minutes 500 active nuclei are left in the sample. The decay constant of the sample is

A

`("ln"(20))/60` per minute

B

`("ln"(2))/20` per minute

C

`20"ln"(2)` per minute

D

`60"ln"(2)` per minute

Text Solution

Verified by Experts

The correct Answer is:
B
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